Prospective, cross-sectional study examining the high-resolution CT scans obtained in 63 stable renal transplant recipients taking immunosuppressive treatment for at least 24 months. The findings in patients taking the newer immunosuppressive drugs (mycophenolic acid, sirolimus and everolimus) are compared with those of the patients treated in the traditional way (cyclosporine, tacrolimus, azathioprine). All patients undergo high-resolution CT scanning.